Brake Caliper BMW E90 E91 Front Right O/S Brake Unit Carrier Housing 57/30/348

Brake Caliper BMW E90 E91 Front Right O/S Brake Unit Carrier Housing is an original component from the Brake calipers and carriers group, designed for use in the front right section of the braking system. This used OEM component ensures a proper fit with the steering knuckle, brake disc, and pads, which translates into stable, predictable brake performance in daily operation.

Specifications and technical data

• SKU: 6773202-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6773202
• Substitutable numbers: 6773202, 34116773202
• Location on the vehicle: Front, Right
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper is designed for installation on the front right axle of BMW E90/E91 series vehicles, where it is responsible for evenly pressing the brake pads against the disc during braking. The design provided by the manufacturer ensures adequate body rigidity, correct pad guidance, and stable piston operation across a wide range of temperatures and loads.

Thanks to the factory mounting geometry, the caliper works with original carriers, brake lines, and suspension components, which facilitates installation and reduces the risk of improper alignment relative to the disc. This is particularly important during intensive vehicle use, where repeatable braking force and predictable vehicle behavior are essential.

Benefits of using an original BMW caliper

Choosing an original brake caliper for the BMW E90/E91 allows you to maintain the factory performance parameters of the braking system. Key advantages of this solution include:

• Precise fit to the hub, disc, and pads intended for this vehicle axle, without the need to modify accompanying components.
• Consistency with the factory braking force characteristics, which helps maintain vehicle stability during emergency braking.
• Compatibility with standard safety systems, such as ABS or traction control, by maintaining the correct geometry and piston operating range.
• Possibility of economical refurbishment in the future (replacement of seals, guide pins, lubrication), which extends the component's lifecycle.

Using original elements from the Brake calipers and carriers group is particularly important in vehicles where predictable, repeatable braking and maintaining the factory front-to-rear balance are priorities.

Characteristics of the used component

The offered brake caliper is a used component, which allows for a significant reduction in repair costs compared to purchasing a new OEM part, while maintaining proper compatibility with the BMW E90/E91 braking system. A used component of this type is a good choice in situations where the existing caliper has suffered mechanical damage, body corrosion, or piston seizure, and repair is no longer cost-effective.

Before installation, a standard service procedure is recommended: checking the condition of working surfaces, threads, brake line ports, and – if necessary – replacing the repair kit (seals, boots, guide pins). This approach allows you to fully utilize the potential of the used caliper and ensure stable system operation in the long term.

Selection and integration with other system components

To maintain even brake performance, it is recommended that the technical parameters of the caliper match the factory solution used on the front axle. In practice, this means matching the disc diameter, pad thickness, and type of brake lines used in the specific BMW E90/E91 variant. Proper component selection minimizes the risk of uneven pad wear, disc overheating, or vehicle pulling during braking.

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other elements from the same group, such as additional calipers, carriers, or brackets, check the available parts in the BMW brake calipers and carriers category.

Technical support and cost optimization

When choosing a used brake caliper, it is worth relying on verified sources and reliable technical knowledge. To better understand how to safely use reclaimed parts while optimizing your repair budget, read the article Brake calipers under the microscope: How to effectively reduce braking system repair costs by choosing verified reclaimed parts. You will find practical tips there regarding the selection, condition assessment, and operation of used braking system components.